Keyestudio Ks0428, Manual

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How to control each led light of 8*16 dot matrix? We know that a
byte has 8 bits, each bit is 0 or 1. When a bit is 0, turn off LED and
when a bit is 0, turn on LED. Thereby, one byte can control the LED
in a row of dot matrix, so 16 bytes can control 16 columns of led
lights, that is, 8*16 dot matrix.
Interface Description and Communication Protocol:
The data of the microprocessor (arduino) communicates with the
AiP1640 through the two-wire bus interface.
The communication protocol diagram is shown below:
(SCLK) is SCL, (DIN) is SDA:
①The starting condition for data input: SCL is high level and SDA
changes from high to low.
②For data command setting, there are methods as shown in the
figure below
In our sample program, select the way to
add 1 to the address
automatically , the binary value is 0100 0000 and the
corresponding hexadecimal value is 0x40